Rock Identifier

Category

Crystal

Browse crystal specimens identified by the Rock Identifier community.

Learn about Crystal in the encyclopedia

Amethyst

Ametrine

Apophyllite

Aquamarine Crystal

Aquamarine Crystal

Aventurine

Blue Quartz

Brandberg Amethyst

Brandberg Amethyst

Cactus Quartz

Cathedral Quartz

Cathedral Quartz

Chevron Amethyst

Chevron Amethyst

Clear Quartz

Danburite

Calcite crystal (Calcite, CaCO₃) — mineral

Calcite crystal

Calcite, CaCO₃

Bismuth crystal (Bismuth (Bi), commonly laboratory-grown) — mineral

Bismuth crystal

Bismuth (Bi), commonly laboratory-grown

Quartz crystal (Quartz (silicon dioxide, SiO₂), likely a natural or lightly damaged crystal) — mineral

Quartz crystal

Quartz (silicon dioxide, SiO₂), likely a natural or lightly damaged crystal

Bismuth Crystal (Bismuth (Bi)) — mineral

Bismuth Crystal

Bismuth (Bi)

Quartz crystal (Quartz (silicon dioxide, SiO₂), likely milky or drusy quartz) — mineral

Quartz crystal

Quartz (silicon dioxide, SiO₂), likely milky or drusy quartz

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Bismuth Crystal (Bismuth (element symbol Bi, atomic number 83)) — mineral

Bismuth Crystal

Bismuth (element symbol Bi, atomic number 83)

Amethyst crystal cluster (Amethyst, purple variety of quartz (SiO₂)) — mineral

Amethyst crystal cluster

Amethyst, purple variety of quartz (SiO₂)

Rhinestone (or glass crystal) (Silicon dioxide (if glass) / Various) — Mineral/gemstone imitation

Rhinestone (or glass crystal)

Silicon dioxide (if glass) / Various

Mineral/gemstone imitation

Aquamarine (Beryllium aluminum silicate (Be3Al2Si6O18)) — mineral

Aquamarine

Beryllium aluminum silicate (Be3Al2Si6O18)

Clear quartz crystal (Quartz (silicon dioxide, SiO₂)) — mineral

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Aquamarine (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18)

Raw Emerald (Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)) — mineral

Raw Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Aquamarine (Aquamarine (Beryl variety); Be3Al2Si6O18) — mineral

Aquamarine

Aquamarine (Beryl variety); Be3Al2Si6O18

Tangerine Quartz (Silicon Dioxide (SiO2) with Hematite/Limonite coatings) — mineral

Tangerine Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite coatings

Agate (Dyed High-Grade Polished Slice) (Silicon dioxide (SiO2), Chalcedony crystal variety) — mineral

Agate (Dyed High-Grade Polished Slice)

Silicon dioxide (SiO2), Chalcedony crystal variety

Diamond (Carbon (C), specifically in an isometric crystal system.) — Mineral

Diamond

Carbon (C), specifically in an isometric crystal system.

Druzy quartz geode fragment (Quartz, SiO₂, with a coating of fine drusy crystals) — mineral

Druzy quartz geode fragment

Quartz, SiO₂, with a coating of fine drusy crystals

Druzy quartz fragment (Quartz, SiO₂, with a coating of tiny quartz crystals) — mineral

Druzy quartz fragment

Quartz, SiO₂, with a coating of tiny quartz crystals

Pink tourmaline crystal (probable) (Elbaite tourmaline, Na(Li,Al)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) — mineral

Pink tourmaline crystal (probable)

Elbaite tourmaline, Na(Li,Al)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Raw tourmaline crystal (probable schorl) (Tourmaline group; likely schorl, NaFe3+Al6(BO3)3Si6O18(OH)4) — mineral

Raw tourmaline crystal (probable schorl)

Tourmaline group; likely schorl, NaFe3+Al6(BO3)3Si6O18(OH)4

Clear quartz crystal (likely quartz fragment) (Quartz, silicon dioxide (SiO₂)) — mineral

Clear quartz crystal (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Quartz crystal (likely milky quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

Quartz crystal (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Likely garnet (rough crystal) (Garnet group, likely almandine (Fe₃Al₂(SiO₄)₃); identification from the image is uncertain) — mineral

Likely garnet (rough crystal)

Garnet group, likely almandine (Fe₃Al₂(SiO₄)₃); identification from the image is uncertain

$Clear quartz crystal (Quartz (SiO₂), likely a small rough or naturally fractured crystal) — mineral$

Clear quartz crystal

Quartz (SiO₂), likely a small rough or naturally fractured crystal

Smoky quartz crystal (Quartz, silicon dioxide (SiO₂), likely natural prismatic crystal) — mineral

Smoky quartz crystal

Quartz, silicon dioxide (SiO₂), likely natural prismatic crystal

Aquamarine (Beryl (Be3Al2Si6O18) with trace Iron (Fe2+)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18) with trace Iron (Fe2+)

Aquamarine (Beryl (Be₃Al₂Si‑₆O₁‑₈)) — mineral

Aquamarine

Beryl (Be₃Al₂Si‑₆O₁‑₈)

Emerald in Matrix (Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities) — mineral

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Emerald in Matrix (Beryl (Be3Al2Si6O18) with Chromium impurities) — mineral

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium impurities

Emerald (Faceted Gemstone) (Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)) — mineral

Emerald (Faceted Gemstone)

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Orange calcite crystal (Calcite, calcium carbonate (CaCO₃)) — mineral

Orange calcite crystal

Calcite, calcium carbonate (CaCO₃)

Clear Quartz Sphere (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz Sphere (Rock Crystal)

Silicon Dioxide (SiO2)

Amethyst Cluster (Silicon Dioxide (Quartz variety: Amethyst) - SiO2) — mineral

Amethyst Cluster

Silicon Dioxide (Quartz variety: Amethyst) - SiO2

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)